diff --git a/README-zh.md b/README-zh.md
index a1ad716c..0ad60147 100644
--- a/README-zh.md
+++ b/README-zh.md
@@ -166,7 +166,7 @@ Docker部署的详情，请见[相关文档](https://tikazyq.github.io/crawlab-d
 
 ## 架构
 
-Crawlab的架构包括了一个主节点（Master Node）和多个工作节点（Worker Node），以及 [SeaweeFS](https://github.com/chrislusf/seaweedfs) (分布式文件系统) 和 MongoDB 数据库。
+Crawlab的架构包括了一个主节点（Master Node）和多个工作节点（Worker Node），以及 [SeaweedFS](https://github.com/chrislusf/seaweedfs) (分布式文件系统) 和 MongoDB 数据库。
 
 ![](https://github.com/crawlab-team/images/blob/main/20210729/crawlab-architecture-v0.6.png?raw=true)
 
diff --git a/README.md b/README.md
index f4c05b53..2935035b 100644
--- a/README.md
+++ b/README.md
@@ -164,7 +164,7 @@ For Docker Deployment details, please refer to [relevant documentation](https://
 
 ## Architecture
 
-The architecture of Crawlab is consisted of a master node, worker nodes, [SeaweeFS](https://github.com/chrislusf/seaweedfs) (a distributed file system) and MongoDB database. 
+The architecture of Crawlab is consisted of a master node, worker nodes, [SeaweedFS](https://github.com/chrislusf/seaweedfs) (a distributed file system) and MongoDB database. 
 
 ![](https://github.com/crawlab-team/images/blob/main/20210729/crawlab-architecture-v0.6.png?raw=true)